Armor for tires.



R. G. DUWODY.

ARMOR FOR TIRES.

APPLICATION FILED JUNE 20, 1910.

Patented Jan. 10, 1911.

.1. w m. n.

UNTTED STATES PATENT onirica.

RICHARD c. nUNwoDY, or Amma., esonera.

kanon ron Trans.

specification of Letters Patent.

vPatented Jan. 10, 1911..

y animation mea June 2o, 1910. seal ne. 567,864..

To all whom 'it may conf/rm Be it `known that I, RIGHARD G. DUNWODY, y

a ycitizen of the United States of America, residing at Atlanta', in the county of Fulton and State of Georgia, have invented certain new an'd useful Improvements in Armor for Tires, of which thgJ following is a specifica,

'This invention relates toa protective,

armor fr"pneumatic tires, the4 object of the invention being to provide a structure adaptedtto lie inside of the outer casing of a tire and to protect the inner tube thereof against puncture.

Further ob]ects and advantages of the invention will beset forth in the detailed description which now follows:

In the accompanyin drawing, Figure l is a transverse section o the outer casing of a pneumatic tire with the inner tube omitted, and with the protective armor injplace, Fig. 2 is a longitudinal sectional view of a portion of the tire shown in Fig. l, .u on a reduced scale' and upon line 2-.2 of Big. 1, and, Fig. 3 is a sectional perspective view of the armor adapted' for use with a slightly modified shape of tire..

Like numerals designate corresponding' parts in all of the gures of the drawlng.

Referring to the drawing, the numeral 5 designates the outer casing of a tire. The protective armor comprises a bowed annulus G of sheet metal so shaped in cross section as to conform closely to the inner peripheryor` the casing 5. This annulus 6 is referably of steel, though it may be formed of other metal if desired. A casing 7 preferably of canvas incloses the annulus 6 and also in .closes a raw cotton packing 8. The term annulus is used in the sense that the member 6 extends entirely around the wheel,

I longitudinally of 'the tire. The inner free ends of the armor composed of the'members 6, 7, and 8, are engaged in a keeper 9. This This renders it applicable to different Wheels, renders it possible to transfer it from one Wheel to another, and renders it applicable t0 the tires already in use.

' WhileI have shown the armor separate from the outer casing in Fig. 1, it is apparent that it may be secured thereto if desired. It is a Well known fact, that raw cotton-is very efficient in deiiecting pointed objects, such for instance as tacks,na1ls, 'and the like. An object such as a tack or nail must penetrate the two thicknesses of canvas forming' the casing`"'7, the raw cotton and the steel annulus before it can `reach the inner tube. It is apparent that it would be quite impossible for this to o'ccur.v i

The armor hereinv shown' and described serves another useful purpose. It is a well known fact that more deflated tires are caused by blow-outs than by direct punctures. In an ordinary tire, the iiexingof the casing 5 occurs principally is the point close to where the clencher rim engages the tire and'the constant exing lof the tire at this point causes it to rim-cut and to crack longitudinally of the tire. It will bef A l noted that that portion ofthe armor lying ,8'5

behind the point indicated by the arrow a is straight'. This reinforces the vtire at the' -point indicated by the arrow al andthe armor tends more readily to Hex at about the point indicated by the arrow I1 This has a tendency Ato cause the casing 5 to be "flexed adjacent the point indicated bythe arrowv b and since thecasing'is flexed over this rounded surface of conslderableradius, its bend at any one point is'not very great and it consequent-ly will not crack so readily.

I1`urtherinore, rim-cutting vis thereby abso-A lutely prevented'. p

From the foregoing description, it will be seen that simple and eiicient means vare `herein provided for accomplishing the objects lof the invention, but .while the elements shown and described "are 4well adapted to serve the purposes for which they are intended, it is to be understood that the invention is not limited to the precise construction yset fort-h, but includes within its purview such changes as ma be made within the scope of the appendedyclaims.Y

vHaving' described my invention, what ,.I claim is: Y f

,1. vA reinforcin armor for tires comprising a bowedannu us, aV packing of raw cotat the point in-Y dicated by the arrow a in Fig. 1. This ing inclosingboththe annulus and the raw cotton, and a keeper member with which the free ends of -seid armor has sliding engage- 8 men v 9. A ninfo'rcin armor for tires comprising I, bowed annu us, a packing of raw cotton surrounding said annulus and a canvas casing incl both the annulus and the 10 tn .w cotton, sai armor havin its terminal portions extending in 'straig t lines and vasomo i ved es of the armor. 1b

n testimon whereof I aix my signature in presence o two witnesses.

RICHARD G. DUNWODY. 

